Nobody used to bother so much about the keywords of a book in the past as the authors of new books have to bother nowadays.

A choice has to be made between “the keywords most searched by the prospective buyers of a book” and “how best the keywords relate to the contents of the book”. One has to weigh in his mind how much importance he wants to give to “the keywords most searched by the prospective buyers of a book” and “how best the keywords relate to the contents of the book”.

I weigh more on “how best the keywords relate to the contents of the book”.

As such, the keywords assigned by me to my book are  

1. Multidimensional versions of Cartesian system
2. Scope of using 3-D and 4-D complex numbers 
3. Dependence of science on technological progress
4. Alchemistic Mindset  
5. Unscientificness of the concept of Barycenters
6. Bipolarity of water molecules
7. Deciphering logographs of water droplets